FWIW:
1952 Gibson Goldtop trapeze bridge. this is the one Les got pissed about because Gibson screwed up his patent and underslung it. the early '52 GT's didn't have enough neck angle to sling it correctly and, it took the pressure off the bridge so it would walk sideways and not hold intonation. Les was livid.
1952 Gibson Goldtop compensated bridge for a factory installed Bigsby. Bigsby add on bridges that came with aftermarket vibrato's were different.
the bridges i was talking about when we were on the phone Dr. the top one is going to the Netherlands and the bottom one to Japan.
and, I got that Fralin sidewinder P90.